The losing Democrat challenger for Dallas County District Attorney alleged voter fraud committed by fellow Democrats cost her the win in a March primary race, according to the lawsuit filed Monday in Dallas County District Court.

With a primary election a few weeks away, Dallas County officials say they already received suspicious mail-in ballots, triggering election integrity vigilance in the wake of last year’s voter fraud scandal engulfing two city council races. It led to hundreds of sequestered ballots, one arrest, and a state law to squash such illegal activity.